<!--
 * @FilePath     : /study_code/css/border_triangle.html
 * @Description  : 边框实现容器边三角形
 * @Date         : 2025-04-27 11:35:03
 * @Author       : Fang YingGui
 * @LastEditors  : fangyinggui 18715384437@163.com
 * @LastEditTime : 2025-04-27 11:38:27
-->
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>documentName</title>
    <link rel="stylesheet" href="" />
    <style>
      .moreMenu {
        position: relative;
        /* line-height: 46px; */
        width: 12%;
        min-width: 150px;
        text-align: center;
        cursor: pointer;
      }
      .moreMenu:hover > div {
        display: block;
      }

      .moreMenu > div {
        box-shadow: 0px 0px 16px 0px rgba(199, 21, 34, 0.16);
      }
      .moreMenu > div {
        position: absolute;
        top: 26px;
        background: #fff;
        width: 100%;
        border-radius: 4px;
        padding: 10px;
        box-sizing: border-box;
        box-shadow: 0px 0px 16px 0px rgba(41, 50, 255, 0.16);
        display: none;
      }
      .moreMenu > div > li {
        width: 100%;
        box-sizing: border-box;
        padding: 0;
      }
      .mainMenu li {
        /* height: 80px; */
        line-height: 80px;
        padding: 0px 12px;
      }
      .moreMenu > div:before {
        content: '';
        display: block;
        border: 8px solid transparent;
        border-bottom: 8px solid #fff;
        position: absolute;
        top: -16px;
        margin-left: -8px;
        left: 50%;
      }
    </style>
  </head>
  <body>
    <div class="moreMenu">
      更多菜单
      <div>
        <li class="navitem">
          <a href="/manage" target="_blank"><span data-title="管理平台">管理平台</span></a>
        </li>
        <li class="navitem">
          <a href="/news" target="_blank"><span data-title="新闻资讯">新闻资讯</span></a>
        </li>
        <li class="navitem">
          <a href="/aboutUsDetail" target="_blank"><span data-title="关于我们">关于我们</span></a>
        </li>
      </div>
    </div>
  </body>
</html>
